diff --git a/src/jmh/java/com/tomfran/lsm/tree/LSMTreeAddBenchmark.java b/src/jmh/java/com/tomfran/lsm/tree/LSMTreeAddBenchmark.java
index 3b94187..f2d876e 100644
--- a/src/jmh/java/com/tomfran/lsm/tree/LSMTreeAddBenchmark.java
+++ b/src/jmh/java/com/tomfran/lsm/tree/LSMTreeAddBenchmark.java
@@ -4,7 +4,6 @@
 import com.tomfran.lsm.utils.BenchmarkUtils;
 import org.openjdk.jmh.annotations.*;
 
-import java.io.IOException;
 import java.nio.file.Path;
 import java.util.concurrent.TimeUnit;
 
@@ -12,7 +11,7 @@
 @State(Scope.Benchmark)
 public class LSMTreeAddBenchmark {
 
-    static final Path DIR = Path.of("tree_benchmark");
+    static final Path DIR = Path.of("tree_add_benchmark");
     static final int NUM_ITEMS = 1000000;
     static final int MEMTABLE_SIZE = 1 << 18;
     static final int LEVEL_SIZE = 5;
@@ -22,16 +21,14 @@ public class LSMTreeAddBenchmark {
     ByteArrayPair[] items;
 
     @Setup
-    public void setup() throws IOException {
+    public void setup() {
         tree = BenchmarkUtils.initTree(DIR, MEMTABLE_SIZE, LEVEL_SIZE);
         items = BenchmarkUtils.fillItems(NUM_ITEMS);
     }
 
     @TearDown
-    public void teardown() throws InterruptedException {
-        tree.stop();
-        Thread.sleep(5000);
-        BenchmarkUtils.deleteDir(DIR);
+    public void teardown() {
+        BenchmarkUtils.stopTreeAndCleanDisk(tree, DIR);
     }
 
     @Benchmark
diff --git a/src/jmh/java/com/tomfran/lsm/tree/LSMTreeGetBenchmark.java b/src/jmh/java/com/tomfran/lsm/tree/LSMTreeGetBenchmark.java
index 3443f10..025ac6a 100644
--- a/src/jmh/java/com/tomfran/lsm/tree/LSMTreeGetBenchmark.java
+++ b/src/jmh/java/com/tomfran/lsm/tree/LSMTreeGetBenchmark.java
@@ -5,7 +5,6 @@
 import org.openjdk.jmh.annotations.*;
 import org.openjdk.jmh.infra.Blackhole;
 
-import java.io.IOException;
 import java.nio.file.Path;
 import java.util.concurrent.TimeUnit;
 
@@ -15,7 +14,7 @@
 @State(Scope.Benchmark)
 public class LSMTreeGetBenchmark {
 
-    static final Path DIR = Path.of("tree_benchmark");
+    static final Path DIR = Path.of("tree_get_benchmark");
     static final int NUM_ITEMS = 1000000;
     static final int MEMTABLE_SIZE = 1 << 18;
     static final int LEVEL_SIZE = 5;
@@ -25,7 +24,7 @@ public class LSMTreeGetBenchmark {
     ByteArrayPair[] items;
 
     @Setup
-    public void setup() throws IOException {
+    public void setup() {
         tree = BenchmarkUtils.initTree(DIR, MEMTABLE_SIZE, LEVEL_SIZE);
         items = BenchmarkUtils.fillItems(NUM_ITEMS);
         for (var i : items)
@@ -35,10 +34,8 @@ public void setup() throws IOException {
     }
 
     @TearDown
-    public void teardown() throws InterruptedException {
-        tree.stop();
-        Thread.sleep(5000);
-        BenchmarkUtils.deleteDir(DIR);
+    public void teardown() {
+        BenchmarkUtils.stopTreeAndCleanDisk(tree, DIR);
     }
 
     @Benchmark
diff --git a/src/jmh/java/com/tomfran/lsm/utils/BenchmarkUtils.java b/src/jmh/java/com/tomfran/lsm/utils/BenchmarkUtils.java
index 7806492..7ff04b9 100644
--- a/src/jmh/java/com/tomfran/lsm/utils/BenchmarkUtils.java
+++ b/src/jmh/java/com/tomfran/lsm/utils/BenchmarkUtils.java
@@ -13,14 +13,22 @@
 public class BenchmarkUtils {
 
     public static LSMTree initTree(Path dir, int memSize, int levelSize) {
-        // setup directory
         if (Files.exists(dir))
             deleteDir(dir);
 
-        // setup tree
         return new LSMTree(memSize, levelSize, dir.toString());
     }
 
+    public static void stopTreeAndCleanDisk(LSMTree tree, Path dir) {
+        try {
+            tree.stop();
+            Thread.sleep(5000);
+        } catch (Exception ignored) {
+        }
+
+        deleteDir(dir);
+    }
+
     public static ByteArrayPair[] fillItems(int n) {
         ByteArrayPair[] items = new ByteArrayPair[n];
         for (int i = 0; i < n; i++)
@@ -39,8 +47,11 @@ public static void shuffleItems(ByteArrayPair[] v) {
     }
 
     public static void deleteDir(Path dir) {
-        try (var f = Files.walk(dir)) {
-            f.map(Path::toFile).forEach(File::delete);
+        try {
+            try (var f = Files.walk(dir)) {
+                f.map(Path::toFile).forEach(File::delete);
+            }
+            Files.delete(dir);
         } catch (Exception ignored) {
         }
     }